cd04d2c49c
Phase A: mail_send + mail_inbox_list + mail_inbox_read. Replaces a legacy mail CLI script with a typed MCP server. Outbound guarantees Date, Message-ID (own-domain), User-Agent, MIME-Version, multipart/alternative for HTML+text, multipart/mixed for attachments, In-Reply-To + References for threading. Single account in v0.1 (default_account from config). Phase B adds multi-account + threading + search; Phase C adds mark + attachments + reply helper. Stack: rmcp 0.1 (matches aldabra), lettre 0.11 + tokio-rustls, async-imap 0.10, mail-parser 0.9. Stderr-only logging (stdout is the MCP transport). Smoke verified 2026-05-21: send -> land -> read user@example.com round trip, DKIM-Signature + Authentication-Results pass at the rspamd relay.
66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
//! mail-mcp — MCP server entry point.
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//!
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//! Speaks MCP over stdio. Any MCP client launches this as a
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//! subprocess
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//! and gets `mail_send` + `mail_inbox_list` + `mail_inbox_read`.
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//!
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//! Logging is stderr-only — stdout belongs to the JSON-RPC transport.
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mod config;
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mod imap;
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mod smtp;
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mod tools;
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use std::process::ExitCode;
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use anyhow::Result;
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use rmcp::{transport::stdio, ServiceExt};
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use tracing_subscriber::EnvFilter;
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use crate::config::Config;
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use crate::tools::MailService;
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#[tokio::main]
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async fn main() -> ExitCode {
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tracing_subscriber::fmt()
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.with_writer(std::io::stderr)
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.with_env_filter(
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EnvFilter::try_from_default_env().unwrap_or_else(|_| "info".into()),
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)
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.init();
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// rustls 0.23 requires the process-wide default CryptoProvider to be set
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// before any TLS handshake. lettre carries its own internal provider for
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// SMTP; our IMAP path goes through tokio-rustls + raw `ClientConfig`,
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// which needs this. Install once at startup; ignore the Err which only
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// surfaces if a provider is already installed (idempotent).
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let _ = rustls::crypto::ring::default_provider().install_default();
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match run().await {
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Ok(()) => ExitCode::SUCCESS,
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Err(e) => {
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tracing::error!("{e:#}");
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ExitCode::FAILURE
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}
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}
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}
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async fn run() -> Result<()> {
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let cfg = Config::load()?;
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tracing::info!(
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accounts = cfg.accounts.len(),
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default_account = %cfg.default_account,
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"mail-mcp starting"
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);
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let service = MailService::new(cfg);
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let server = service
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.serve(stdio())
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.await
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.map_err(|e| anyhow::anyhow!("rmcp serve failed: {e}"))?;
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server
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.waiting()
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.await
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.map_err(|e| anyhow::anyhow!("rmcp wait failed: {e}"))?;
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Ok(())
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}
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